diff --git a/requirements.txt b/requirements.txt
index dfc72da..7839ce6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ jsonschema==3.2.0
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.2
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 murmurhash==1.0.2
 nbformat==4.4.0